"People don't care about their privacy, it's a simple as that."
People do care about their privacy - absolutely - and that 'care' is increasing. That said, I definitely agree with 'bubbletink'.
"Privacy is not a product, it's a feature" is generally what I say, unless it's literally some kind of 'id securing' product you're selling. By that I mean, for a social network or any other non-security product, what users care about most is ease of use, cost, features, access to friends, hype/cool factor ... and then privacy is just one of those later tick-boxes.
So I don't even think that a 'privacy first' Social Network will really take off unless it offers something else, more salient as it's primary offer, with 'privacy' just happening to be a really nice add-on, or better yet, something inherent or existential about the product or architecture.
Also, I do think people are 'voting with their feet' as a lot of folks are switching to things like Instagram, wherein it's just some photos, the ability to message, and not a lot of the deep banter and political stuff. Just fashion, kiddies, kittens, celeb-selfies, and a lot less dialogue. This 'trend' is in a way inherently more private because it implies considerably less personal information, and considerably more default-private activity.
Also remember that Snapchat got big because of 'disappearing videos'. It wasn't just 'stories' - it was 'stories that disappear' and can't be searched! A little bit of sexting innuendo there, but an inherent 'privacy' nature to that.
In then end, we should also consider that many of us (esp. your Eng friends) are not stupid, and may just opt to use FB in a fairly minimalist fashion, i.e. not sharing too-too much.
I used FB in that manner and I make no assumptions about what they are 'learning' about me, and frankly, I don't care that much.
Apple is just not a data/social company - and so this new 'privacy trend' fell on their laps just about the same way the blockchain stuff fell on NVidia. It's a movement that is consistent with their current business model, and so it behoves them to continue in that direction and even support it.
But yes, fully agree, most of us have quite a different perspective than 'joe user' we have to consider that.